What does '0.040 inch undersize' mean for these bearings?

This means the bearings are manufactured to be 0.040 inches smaller in diameter than the original factory specifications. They are intended for use with a crankshaft that has been machined down by 0.040 inches to account for wear.

What material are these main bearings made from?

These bearings are constructed from a tri-metal material. This type of material is known for its good embeddability and conformability, which helps to protect the crankshaft journals during operation.

Are these bearings a direct replacement for the stock Fiat Regata 85 main bearings?

Yes, these bearings are designed as a direct replacement for the stock main bearings in the Fiat Regata 85. They are intended to be used during an engine rebuild or bottom-end overhaul.

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Specifications

Brand: King Engine Bearings
Part #: MB5549CP040
UPC: 611500479373

King Engine Bearings 83-95 Fiat Regata 85 Main Bearing - Set of 10

Name: King Engine Bearings 83-95 Fiat Regata 85 Main Bearing - Set of 10
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-83-95-fiat-regata-85-main-bearing-set--t14-712005
Price: 131.72 USD
Availability: BackOrder

$131.72

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King Engine Bearings Main Bearing Set MB5549CP040. This is a 0.040 inch undersize bearing set.

Key Features

This is a 0.040 inch undersize bearing set.
Includes a complete set of 10 main bearings.
Features a tri-metal construction for durability.
Designed for the Fiat Regata 85.

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About this part

Product Details

If you're rebuilding the bottom end of your Fiat Regata, a fresh set of main bearings is crucial for proper crankshaft support. These main bearings from King Engine Bearings are designed to replace the stock units and ensure the crankshaft spins smoothly within the engine block. They are built to handle the demands of daily driving and performance use.

This particular set is 0.040 inches undersize, meaning it's intended for crankshafts that have been machined down to compensate for wear. King Engine Bearings uses a specialized tri-metal material that offers good embeddability and conformability, helping to protect the crankshaft journals. The set includes all the necessary main bearings for a complete engine rebuild.